Question

Im new to VB. I am coming from a Java background. In the following code

Sub PrintList(Of T)(ByVal list As List(Of T))
        For Each obj As T In list
            Console.Write(obj.ToString() + " ")
        Next
        Console.WriteLine()
    End Sub

Can someone help me to understand what Sub PrintList(Of T)(ByVal list As List(Of T)) means?
Why do you need the (Of T) part? Why isn’t (ByVal list As List(Of T)) sufficient?

Answer 1

In Java, this would be something like:

public static <T> void printList(List<T> list)

The (Of T) after PrintList is the equivalent to the <T> before void in the Java version. In other words, it’s declaring the type parameter for the generic method.